The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform

A Kipping - One of the best experts on this subject based on the ideXlab platform.

  • understanding heat transfer mechanisms during the cooling phase of blow molding using infrared thermography
    Ndt & E International, 2005
    Co-Authors: Abdelhakim Bendada, Fouad Erchiqui, A Kipping
    Abstract:

    The cooling phase of the extrusion blow molding process has a large influence on the cycle time of the process as well as on the properties and quality of the Molded Products. A better understanding of the heat transfer mechanisms occurring during the cooling phase will help in the optimization of both mold cooling channels and operating conditions. A continuous extrusion blow molding machine and a rectangular bottle (motor oil type) mold were used to produce bottles. A high density polyethylene (HDPE) and a metallocene polyethylene (mPE) having different rheological properties were tested. Melt and mold temperatures, cooling time, inflating pressure and die gap were varied systematically. An infrared camera was used to measure the temperature distribution of the plastic part just after mold opening as well as after part ejection. The wall thickness and dimensions of the bottles of the finished parts were measured in order to determine the shrinkage and warpage. Finally, the infrared temperature fingerprints were used to explain what happens during the cooling phase and correlated with the final part characteristics.

  • understanding heat transfer mechanisms during the cooling phase of blow molding using infrared thermography
    Ndt & E International, 2005
    Co-Authors: Abdelhakim Bendada, Fouad Erchiqui, A Kipping
    Abstract:

    The cooling phase of the extrusion blow molding process has a large influence on the cycle time of the process as well as on the properties and quality of the Molded Products. A better understanding of the heat transfer mechanisms occurring during the cooling phase will help in the optimization of both mold cooling channels and operating conditions. A continuous extrusion blow molding machine and a rectangular bottle (motor oil type) mold were used to produce bottles. A high density polyethylene (HDPE) and a metallocene polyethylene (mPE) having different rheological properties were tested. Melt and mold temperatures, cooling time, inflating pressure and die gap were varied systematically. An infrared camera was used to measure the temperature distribution of the plastic part just after mold opening as well as after part ejection. The wall thickness and dimensions of the bottles of the finished parts were measured in order to determine the shrinkage and warpage. Finally, the infrared temperature fingerprints were used to explain what happens during the cooling phase and correlated with the final part characteristics.

Abdelhakim Bendada - One of the best experts on this subject based on the ideXlab platform.

  • understanding heat transfer mechanisms during the cooling phase of blow molding using infrared thermography
    Ndt & E International, 2005
    Co-Authors: Abdelhakim Bendada, Fouad Erchiqui, A Kipping
    Abstract:

    The cooling phase of the extrusion blow molding process has a large influence on the cycle time of the process as well as on the properties and quality of the Molded Products. A better understanding of the heat transfer mechanisms occurring during the cooling phase will help in the optimization of both mold cooling channels and operating conditions. A continuous extrusion blow molding machine and a rectangular bottle (motor oil type) mold were used to produce bottles. A high density polyethylene (HDPE) and a metallocene polyethylene (mPE) having different rheological properties were tested. Melt and mold temperatures, cooling time, inflating pressure and die gap were varied systematically. An infrared camera was used to measure the temperature distribution of the plastic part just after mold opening as well as after part ejection. The wall thickness and dimensions of the bottles of the finished parts were measured in order to determine the shrinkage and warpage. Finally, the infrared temperature fingerprints were used to explain what happens during the cooling phase and correlated with the final part characteristics.

  • understanding heat transfer mechanisms during the cooling phase of blow molding using infrared thermography
    Ndt & E International, 2005
    Co-Authors: Abdelhakim Bendada, Fouad Erchiqui, A Kipping
    Abstract:

    The cooling phase of the extrusion blow molding process has a large influence on the cycle time of the process as well as on the properties and quality of the Molded Products. A better understanding of the heat transfer mechanisms occurring during the cooling phase will help in the optimization of both mold cooling channels and operating conditions. A continuous extrusion blow molding machine and a rectangular bottle (motor oil type) mold were used to produce bottles. A high density polyethylene (HDPE) and a metallocene polyethylene (mPE) having different rheological properties were tested. Melt and mold temperatures, cooling time, inflating pressure and die gap were varied systematically. An infrared camera was used to measure the temperature distribution of the plastic part just after mold opening as well as after part ejection. The wall thickness and dimensions of the bottles of the finished parts were measured in order to determine the shrinkage and warpage. Finally, the infrared temperature fingerprints were used to explain what happens during the cooling phase and correlated with the final part characteristics.

Fouad Erchiqui - One of the best experts on this subject based on the ideXlab platform.

  • understanding heat transfer mechanisms during the cooling phase of blow molding using infrared thermography
    Ndt & E International, 2005
    Co-Authors: Abdelhakim Bendada, Fouad Erchiqui, A Kipping
    Abstract:

    The cooling phase of the extrusion blow molding process has a large influence on the cycle time of the process as well as on the properties and quality of the Molded Products. A better understanding of the heat transfer mechanisms occurring during the cooling phase will help in the optimization of both mold cooling channels and operating conditions. A continuous extrusion blow molding machine and a rectangular bottle (motor oil type) mold were used to produce bottles. A high density polyethylene (HDPE) and a metallocene polyethylene (mPE) having different rheological properties were tested. Melt and mold temperatures, cooling time, inflating pressure and die gap were varied systematically. An infrared camera was used to measure the temperature distribution of the plastic part just after mold opening as well as after part ejection. The wall thickness and dimensions of the bottles of the finished parts were measured in order to determine the shrinkage and warpage. Finally, the infrared temperature fingerprints were used to explain what happens during the cooling phase and correlated with the final part characteristics.

  • understanding heat transfer mechanisms during the cooling phase of blow molding using infrared thermography
    Ndt & E International, 2005
    Co-Authors: Abdelhakim Bendada, Fouad Erchiqui, A Kipping
    Abstract:

    The cooling phase of the extrusion blow molding process has a large influence on the cycle time of the process as well as on the properties and quality of the Molded Products. A better understanding of the heat transfer mechanisms occurring during the cooling phase will help in the optimization of both mold cooling channels and operating conditions. A continuous extrusion blow molding machine and a rectangular bottle (motor oil type) mold were used to produce bottles. A high density polyethylene (HDPE) and a metallocene polyethylene (mPE) having different rheological properties were tested. Melt and mold temperatures, cooling time, inflating pressure and die gap were varied systematically. An infrared camera was used to measure the temperature distribution of the plastic part just after mold opening as well as after part ejection. The wall thickness and dimensions of the bottles of the finished parts were measured in order to determine the shrinkage and warpage. Finally, the infrared temperature fingerprints were used to explain what happens during the cooling phase and correlated with the final part characteristics.

U. Figueroa-lópez - One of the best experts on this subject based on the ideXlab platform.

  • Residual stresses in injection Molded Products
    Journal of Materials Science, 2014
    Co-Authors: A. Guevara-morales, U. Figueroa-lópez
    Abstract:

    Injection molding is the most widely used processing technique for polymers. It offers several advantages over other processing conditions such as good surface finish, the ability to process complex parts without the need of secondary operations, and low cost for mass production. However, because of the complex deformation, and thermal and pressure histories that the polymer melt experiences during processing, residual stresses develop. These stresses act internally at room temperature and have the same effects on the material as externally applied stresses do, resulting in shrinkage and warpage of the product. In recent years, with the development and use of engineering plastics in an increasing number of applications, and with the tougher quality control policies in industries such as the automotive, the effects of residual stresses in product quality and performance have raised great interest. This review reports up-to-date advances in the field of residual stresses developments in polymers, with special attention given to injection Molded Products. Flow- and thermal-induced residual stresses are reported. Emphasis is given to the processing parameters that most influence residual stresses during injection molding as well as the effect of residual stresses not only on warpage but also on other material properties.

A. Guevara-morales - One of the best experts on this subject based on the ideXlab platform.

  • Residual stresses in injection Molded Products
    Journal of Materials Science, 2014
    Co-Authors: A. Guevara-morales, U. Figueroa-lópez
    Abstract:

    Injection molding is the most widely used processing technique for polymers. It offers several advantages over other processing conditions such as good surface finish, the ability to process complex parts without the need of secondary operations, and low cost for mass production. However, because of the complex deformation, and thermal and pressure histories that the polymer melt experiences during processing, residual stresses develop. These stresses act internally at room temperature and have the same effects on the material as externally applied stresses do, resulting in shrinkage and warpage of the product. In recent years, with the development and use of engineering plastics in an increasing number of applications, and with the tougher quality control policies in industries such as the automotive, the effects of residual stresses in product quality and performance have raised great interest. This review reports up-to-date advances in the field of residual stresses developments in polymers, with special attention given to injection Molded Products. Flow- and thermal-induced residual stresses are reported. Emphasis is given to the processing parameters that most influence residual stresses during injection molding as well as the effect of residual stresses not only on warpage but also on other material properties.